Title bars + some locale strings.
Fixes.
Merge branch 's3-titlebars' of https://github.com/arkon94/Markus into arkon-s3-titlebars

Conflicts:
	app/views/assignments/index.html.erb
	app/views/grade_entry_forms/grades.html.erb
	app/views/groups/index.html.erb
	app/views/notes/index.html.erb
	app/views/rubrics/index.html.erb
	app/views/submissions/browse.html.erb
	config/locales/en.yml